bewildered (adj) 不知所措的
He go back home bewildered.
{Bewildered} is an adjective which can’t be used to modify a verb.
{He} is the third singular, so please add -es at the end of {go}.
He goes back home bewilderedly.
He（主语） looks(链接动词） bewildered（主语补语, 形容词）

He do it bewildered.
The same problems mentioned above.
He （主语） does （动词） it （宾语） bewilderedly（副词）.

He stand bewildered.
The same problems mentioned above.
He stands bewilderedly.